After launching a brand new web-site in a very competitive market I was recomended Smart Traffic. After they did some initial research on my businesses market I was given a couple of different payment options and some valuable help on keywords that I should be targeting.
I decided to go for the most expensive option as I wanted to see guaranteed results fast, Smart Traffic delivered in the time frame of the guarantee all be it nearer the end but I was still very impressed as the main search terms were big key words with a huge amount of competition.
The results for us once we acheived page 1 were massive, 50% up on sales through the site compared to previous years. I have been with them for 2 years now and would happily recommend them to anyone, it doesn't all happen over night so I would say you just have to be committed to this kind of service and you will see results.